<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2017/9/15
 * Time: 10:50
 */
var_dump($_GET);
//if

//elseif else if

//


//


//


//switch

//case

//default



// 1+2=aaa
//1*2 = aa


//存到数据库中